fix typos and improve sentences (#30432)

x-pack/elastic-agent/pkg/agent/application/paths/files.go

@@ -20,10 +20,10 @@ const defaultAgentFleetFile = "fleet.yml"
 // defaultAgentEnrollFile is a name of file used to enroll agent on first-start
 const defaultAgentEnrollFile = "enroll.yml"
 
-// defaultAgentActionStoreFile is the file that will contains the action that can be replayed after restart.
+// defaultAgentActionStoreFile is the file that will contain the action that can be replayed after restart.
 const defaultAgentActionStoreFile = "action_store.yml"
 
-// defaultAgentStateStoreFile is the file that will contains the action that can be replayed after restart.
+// defaultAgentStateStoreFile is the file that will contain the action that can be replayed after restart.
 const defaultAgentStateStoreFile = "state.yml"
 
 // AgentConfigFile is a name of file used to store agent information

x-pack/elastic-agent/pkg/agent/storage/store/state_store.go

@@ -11,7 +11,7 @@ import (
 	"io"
 	"sync"
 
-	yaml "gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v2"
 
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/errors"
 	"github.com/elastic/beats/v7/x-pack/elastic-agent/pkg/agent/storage"
@@ -46,7 +46,7 @@ type action = fleetapi.Action
 // receives multiples actions to persist to disk, the implementation of the store only
 // take care of action policy change every other action are discarded. The store will only keep the
 // last good action on disk, we assume that the action is added to the store after it was ACK with
-// Fleet. The store is not threadsafe.
+// Fleet. The store is not thread safe.
 type StateStore struct {
 	log   *logger.Logger
 	store storeLoad

x-pack/elastic-agent/pkg/core/monitoring/beats/beats_monitor.go

@@ -23,8 +23,8 @@ import (
 const httpPlusPrefix = "http+"
 const defaultMonitoringNamespace = "default"
 
-// Monitor is a monitoring interface providing information about the way
-// how beat is monitored
+// Monitor implements the monitoring.Monitor interface providing information
+// about beats.
 type Monitor struct {
 	operatingSystem string
 	config          *monitoringConfig.MonitoringConfig
@@ -209,7 +209,7 @@ func (b *Monitor) Prepare(spec program.Spec, pipelineID string, uid, gid int) er
 }
 
 // LogPath describes a path where application stores logs. Empty if
-// application is not monitorable
+// application is not monitorable.
 func (b *Monitor) LogPath(spec program.Spec, pipelineID string) string {
 	if !b.WatchLogs() {
 		return ""

x-pack/elastic-agent/pkg/core/monitoring/monitor.go

@@ -29,7 +29,7 @@ type Monitor interface {
 	Close()
 }
 
-// NewMonitor creates a monitor based on a process configuration.
+// NewMonitor creates beats a monitor based on a process configuration.
 func NewMonitor(cfg *configuration.SettingsConfig) (Monitor, error) {
 	logMetrics := true
 	if cfg.LoggingConfig != nil {

x-pack/elastic-agent/pkg/core/plugin/process/start.go

@@ -39,7 +39,7 @@ func (a *Application) start(ctx context.Context, t app.Taggable, cfg map[string]
 	}()
 
 	// starting only if it's not running
-	// or if it is, then only in case it's restart and this call initiates from restart call
+	// or if it is, then only in case it's a restart and this call initiates from restart call
 	if a.Started() && a.state.Status != state.Restarting {
 		if a.state.ProcessInfo == nil {
 			// already started if not stopped or crashed

x-pack/elastic-agent/pkg/core/plugin/service/app.go

@@ -296,7 +296,7 @@ func (a *Application) Shutdown() {
 
 // OnStatusChange is the handler called by the GRPC server code.
 //
-// It updates the status of the application and handles restarting the application is needed.
+// It updates the status of the application and handles restarting the application when needed.
 func (a *Application) OnStatusChange(s *server.ApplicationState, status proto.StateObserved_Status, msg string, payload map[string]interface{}) {
 	a.appLock.Lock()
 	defer a.appLock.Unlock()